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-rw-r--r--net/wireless/chan.c62
1 files changed, 61 insertions, 1 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index c1999e45a07c..434c56b92c3c 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -82,13 +82,73 @@ int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
int freq, enum nl80211_channel_type chantype)
{
struct ieee80211_channel *chan;
+ int err;
if (!rdev->ops->set_monitor_channel)
return -EOPNOTSUPP;
+ if (!cfg80211_has_monitors_only(rdev))
+ return -EBUSY;
chan = rdev_freq_to_chan(rdev, freq, chantype);
if (!chan)
return -EINVAL;
- return rdev->ops->set_monitor_channel(&rdev->wiphy, chan, chantype);
+ err = rdev->ops->set_monitor_channel(&rdev->wiphy, chan, chantype);
+ if (!err) {
+ rdev->monitor_channel = chan;
+ rdev->monitor_channel_type = chantype;
+ }
+
+ return err;
+}
+
+void
+cfg80211_get_chan_state(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev,
+ struct ieee80211_channel **chan,
+ enum cfg80211_chan_mode *chanmode)
+{
+ *chan = NULL;
+ *chanmode = CHAN_MODE_UNDEFINED;
+
+ ASSERT_RDEV_LOCK(rdev);
+ ASSERT_WDEV_LOCK(wdev);
+
+ if (!netif_running(wdev->netdev))
+ return;
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ if (wdev->current_bss) {
+ *chan = wdev->current_bss->pub.channel;
+ *chanmode = wdev->ibss_fixed
+ ? CHAN_MODE_SHARED
+ : CHAN_MODE_EXCLUSIVE;
+ return;
+ }
+ case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_P2P_CLIENT:
+ if (wdev->current_bss) {
+ *chan = wdev->current_bss->pub.channel;
+ *chanmode = CHAN_MODE_SHARED;
+ return;
+ }
+ break;
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_P2P_GO:
+ case NL80211_IFTYPE_MESH_POINT:
+ *chan = wdev->channel;
+ *chanmode = CHAN_MODE_SHARED;
+ return;
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_WDS:
+ /* these interface types don't really have a channel */
+ return;
+ case NL80211_IFTYPE_UNSPECIFIED:
+ case NUM_NL80211_IFTYPES:
+ WARN_ON(1);
+ }
+
+ return;
}